Extech Instruments EX330 User Manual
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Extech Instruments EX330 User Manual

Mini multimeter with non-contact voltage detector (ncv)
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User's Guide
Mini Multimeter
with Non-Contact Voltage Detector (NCV)
Model EX330

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Summary of Contents for Extech Instruments EX330

  • Page 1 User's Guide Mini Multimeter with Non-Contact Voltage Detector (NCV) Model EX330...

  • Page 2: Safety Instructions

    Introduction Congratulations on your purchase of the Extech EX330 Meter. The EX330 offers AC/DC Voltage, AC/DC Current, Resistance, Diode, Continuity, non-contact Voltage Detection, Capacitance, Frequency, Duty Cycle, and Temperature (Type K) functions. Proper use and care of this meter will provide many years of reliable service.

  • Page 3: Controls And Jacks

    (10 ) (ohms) Farads (capacitance) Ω mega (10 ) (ohms) Ohms Hertz (frequency) Volts Percent (duty ratio) Relative Alternating current AUTO Autoranging Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade Model EX330 - Version 4.0 – 05/06...

  • Page 4: Non-Contact Ac Voltage Detector

    NON-CONTACT AC VOLTAGE DETECTOR The EX330 can detect the presence of AC voltage (from 100 to 600VAC) simply by being held very near to a voltage source. WARNING: Test the AC voltage detector on a known live circuit before each use.

  • Page 5: Ac Voltage Measurements

    V jack. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Read the voltage in the display. Model EX330 - Version 4.0 – 05/06...

  • Page 6: Ac / Dc Current Measurements

    Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. Apply power to the circuit. Read the current in the display. Model EX330 - Version 4.0 – 05/06...

  • Page 7: Resistance Measurements

    Touch the test probe tips to the circuit or wire you wish to check. If the resistance is less than approximately 100Ω, the audible signal will sound. If the circuit is ‘open’ (bad), the display will indicate “OL”. Model EX330 - Version 4.0 – 05/06...

  • Page 8: Diode Test

    Touch the test probes to the diode under test. Forward voltage will typically indicate 0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices will indicate near 0V and an open device will indicate “OL” in both polarities. Model EX330 - Version 4.0 – 05/06...
  • Page 9 The probe can be pressed against a device under test to read its temperature or the probe can be held in air to read the ambient temperature. Allow 30 seconds for the display to stabilize. Read the temperature in the display. Model EX330 - Version 4.0 – 05/06...

  • Page 10: Auto-Manual Range Selection

    Remove old or weak batteries so they do not leak and damage the unit. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit. Model EX330 - Version 4.0 – 05/06...

  • Page 11: Low Battery Indication

    Always use fuses of the proper size and value (500mA/250V fast blow for the mA / µA ranges, 10A/250V fast blow for the A range). Secure the fuse/battery compartment cover. Place the protective rubber holster on the meter. Model EX330 - Version 4.0 – 05/06...

  • Page 12: Auto Power Off

    The meter will automatically turn off after 15 minutes of inactivity. This will conserve battery energy. To turn the meter on after an Auto Power OFF, simply turn the rotary switch to OFF and then back to the desired setting. Model EX330 - Version 4.0 – 05/06...

  • Page 13: Specifications

    0.01MΩ ±(3.5% reading + 40 digits) 0.001nF Capacitance 40nF 0.01nF ±(2.5% reading + 4 digits) 400nF 0.1nF 4µF 0.001µF ±(3.5% reading + 4 digits) 40µF 0.01µF ±(3.5% reading + 10 digits) 200µF 0.1µF Model EX330 - Version 4.0 – 05/06...
  • Page 14 • (+ digits) – This is the accuracy of the analog to digital converter. Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. Model EX330 - Version 4.0 – 05/06...

  • Page 15: General Specifications

    OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment Model EX330 - Version 4.0 – 05/06...

  • Page 16: Warranty

    Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.

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